ici inter-carrier interference 中文意思是什麼

ici inter-carrier interference 解釋
載波間干擾
  • ici : ICI = Imperial Chemical Industries 〈英國〉帝國化學工業公司。
  • inter : vt 埋葬。 inter a dead body into the earth 把屍首埋起來。〈拉丁語〉 在中間,在內,互相。 inter al...
  • carrier : n 1 運送人,搬夫;負荷者;使役,〈美國〉信差,郵遞員;送報人;〈英國〉運輸行,運輸業者。2 傳書鴿...
  • interference : n. 1. 沖突,抵觸。2. 干涉,干預。3. 妨礙,打擾,阻礙物。4. 【物理學】干擾;干涉。
  1. For example, carrier frequency offsets, which are caused by the inherent instabilities of the transmitter and receiver carrier frequency oscillators, can lead to severe system degradation due to inter - carrier interference ( ici ). symbol timing synchronization must also be achieved in order to avoid inter - symbol interference ( isi )

    其載波頻率誤差會引入子通道之間的干擾( ici ) ,而幀同步的誤差會引入符號間干擾( isi ) ,同時還會對通道估計帶來嚴重的影響。
  2. Firstly, in wireless environment, receiver has no know the time delay between transmitter and itself. in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi. secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers. if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system

    Ofdm技術也存在著一些缺陷,首先,在無線環境中傳輸的ofdm信號對定時要求高,為了減少碼間串擾( isi )影響,必須從接收信號中提取出正確的符號起始位;其次, ofdm系統對頻率偏移敏感, ofdm技術的高頻譜利用率和傳輸可靠性均以子載波的正交性為基礎,如果接收機和發射機之間發生頻率偏移,子載波之間就會失去正交性,導致嚴重的子載波間干擾( ici ) ,降低系統性能。
分享友人